What type of detector will cause an alarm to sound whenever the rate of temperature rise exceeds about 15 degrees per minute?

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Multiple Choice

What type of detector will cause an alarm to sound whenever the rate of temperature rise exceeds about 15 degrees per minute?

This question is about how heat detectors respond to temperature changes rather than to a single temperature. A rate-of-rise detector looks at how quickly the temperature is increasing. If the temperature climbs rapidly—about 15 degrees per minute—the detector triggers the alarm. This makes it effective for fast-developing fires where the heat spike comes quickly before a fixed temperature is reached. In contrast, fixed-temperature detectors alarm when a set temperature is reached, regardless of how fast it gets there. Ionization detectors are for detecting smoke, not heat, so they wouldn’t respond to a rapid temperature rise. Rate-compensation detectors adjust for ambient temperature to reduce nuisance alarms but aren’t defined by a rapid temperature rise themselves. So the detector described is a rate-of-rise detector.

This question is about how heat detectors respond to temperature changes rather than to a single temperature. A rate-of-rise detector looks at how quickly the temperature is increasing. If the temperature climbs rapidly—about 15 degrees per minute—the detector triggers the alarm. This makes it effective for fast-developing fires where the heat spike comes quickly before a fixed temperature is reached.

In contrast, fixed-temperature detectors alarm when a set temperature is reached, regardless of how fast it gets there. Ionization detectors are for detecting smoke, not heat, so they wouldn’t respond to a rapid temperature rise. Rate-compensation detectors adjust for ambient temperature to reduce nuisance alarms but aren’t defined by a rapid temperature rise themselves. So the detector described is a rate-of-rise detector.

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